Evaluation of optimal number of soil samples for detail reconstruction of initial field of 137Cs fallout in Chernobyl affected areas

Yıl 2015, Cilt: 4 Sayı: 4, 227 - 233, 01.10.2015

Maxim Ivanov Valentin Golosov Evgeniya Shamsurina

https://doi.org/10.18393/ejss.2015.4.227-233

Öz

A Chernobyl-derived ¹³⁷Cs- fallout was associated with one or two rainfalls Because of that vast areas of the Europe affected by Chernobyl-derived fallout are characterized by non-uniform field of radionuclide contamination. It was assessed after detailed field investigation within few river basins of the Central Russia located in areas with different levels of Chernobyl contamination, that existing maps of radionuclide contamination composed during last two decades are not enough detailed for assessment of initial contamination field transformation by the lateral migration processes of the Chernobyl-derived ¹³⁷Cs. This problem can be overcomed   if additional soil sampling are undertaken in reference locations for correction of exiting radionuclide contamination maps. However it is necessary to evaluate the optimal number of bulk samples which should be taken in each sampling point for receiving statistically correct results of radionuclide concentration. Special investigation was undertaken in few catchments (S= 2-50 km²) of the Central Russia, located in areas with different levels of initial Chernobyl contamination, for evaluation the optimal number of samples, which should be taken in each sampling point for the determination of Cs-137 concentrations error not exceed 30 % on 95 % confidence level.

Anahtar Kelimeler

Cs-137, soil sampling, evaluation of contamination, small catchments, radioecological mapping

Kaynakça

• De Cort, 1998. Insects In: M., Dubois, G., Fridman, S. D., Germenchuk, M. G., Izrael, Y. A., Jones, A.R., Kelly, Kvasnikova, E. V., Matveenko, I. I., Nazarov, I. M., Sitak, V. A., Stukin, E. D., Tabachny, L. Y., Tsaturov, Y. S., & Avdyushin, S. I., Atlas of caesium deposition on Europe after the Chernobyl accident, European Commission Report EUR 16733. Luxembourg: European Commission, plate 1
• Dercon, G., Mabit, L., Hancock, G., Nguyen, M.L., Dornhofer, P., Bacchi, O.O.S., Benmansour, M., Bernard, C., Froehlich, W., Golosov, V.N., Haciyakupoglu, S., Hai, P.S., Klik, A., Li, Y., Lobb, D.A., Onda, Y., Popa, N., Rafiq, M., Ritchie, J.C., Schuller, P., Shakhashiro, A., Wallbrink, P., Walling, D.E., Zapata, F., Zhang, X., 2012. Fallout radionuclide-based techniques for assessing the impact of soil conservation measures on erosion control and soil quality: an overview of the main lessons learnt under an FAO/IAEA Coordinated Research Project. Journal of Environmental Radioactivity 107: 78¬¬-85.
• Golosov, V.N., 2003. Application of Chernobyl-derived 137Cs for the assessment of soil redistribution within a cultivated field. Soil and Tillage Research 69: 85-95.
• Golosov, V.N., Walling, D.E., Panin, A.V., Stukin, E.D., Kvasnikova, E.V., Ivanova, N.N., 1999b. The spatial variability of Chernobyl-derived 137Cs inventories in a small agricultural drainage basin in central Russia. Applied Radiation and Isotopes 51: 341-352.
• Golosov‚ V.N., Panin, A.V., Markelov, M.V. 1999a. Chernobyl Redistribution in the Small Basin of the Lokna River, Central Russia. Physical Chemistry of the Earth 10: 881-885.
• Izrael, Y.A. Kvasnikova, E.V., Nazarov, I.M. Fridman, Sh.D., 1995. Global and regional contamination of Caesium-137 on the European part of former USSR`s territory. Meteorology and Hydrology 5: 5-9 (in Russian)
• Izrael, Y.A., 1990. Chernobyl: radionuclide contamination of the environment p.295. St. Petersburg: Gidrometeoizdat. (in Russian)
• Izrael, Y.A., 1996. Radioactive fallout after nuclear explosions and accidents, Saint Petersburg: Progress-Pogoda. (in Russian)
• Owens, P.N., Walling, D.E., 1996. Spatial variability of caesium-137 inventories at reference sites: an example from two contrasting sites in England and Zimbabwe. Applied Radiation and Isotopes 47: 699-707.
• Quine, T.A., 1989. Use of a simple model to estimate rates of soil erosion from caesium-137 data. Journal of Water Resources 8: 54-81
• Sutherland, R.A., 1991. Examination of Caesium-137 areal activities in control (uneroded) locations. Soil Technology 4: 33-50.
• Walling, D.E., He, Q., 1999. Improved models for estimating soil erosion rates from cesium-137 measurements. Journal of Environmental Quality 28: 611–622.
• Zapata, F., 2002. Handbook for the Assessment of Soil Erosion and Sedimentation Using Environment Radionuclides. Kluwer, Dordrecht, The Netherlands.